Machine and method of swedging characters on metal articles



Oct. 17, 1933. A. E. DRISSNER 1,930,539

MACHINE AND METHOD OF SWEDGING CHARACTERS ON METAL ARTICLES Filed Nov. 8, 1930 3 Sheets-Sheet l INVENTOR 5 ATTORNEY Oct. 17, 1933. DRlSSNER 1,930,589

MACHINE AND METHOD OF SWEDGING CHARACTERS 0N METAL ARTICLES Filed Nov. '8, 19:50 I .3 Shgets-Sheet 2 lNVEItJTOR Patented Oct. 17, 1933 pairs!) STATES MACHINE AND METHOD OF- SWEDGING CHARACTERS ()N METAL ARTECLES Alfred E. Drissner, Cleveland, Ohic, assignor to The National Acme Company, Cleveland, (Bhio,

a corporation of Ohio Application November 8, 1930. Serial No. 494,329

21 Claims.

This invention has to do with the swedging of characters in metal, the object of the invention bei to provide an improved means and method of swedging characters such as letters, figures or other hieroglyphics or designs in the outer surface of metal articles.

uther object is the provision of an improved character swedging means which may be used with a metal working machine having a sliding tool carrier and a rotary work spindle, whereby, in certain machines it is practicable to also perform other operations on the work to prepare it for the character swedging step.

A further object of the invention is the provision oi improved means for swedging characters which the work carrier and swedging carrier will each have rotary movements and a relative sliding movement.

A further object of the invention is the provision of improved means for swedging charactels in which the work car ier and swedging carrier will have rotary movement together in the same direction and at substantially the same speed.

A further object of the invention is the provision of a rotary work carrier and a sliding swedge carrier carrying a series of radially operative character swedging devices or stamps and which machine is simple in construction, inexpensive to in in acture and rapid in operation and will periori.-- its work more eiiiciently than anything heretofore in use.

In the drawings accompanying andforming a part of this specification Figure l is a front View the present improvement applied to a tool slide or of a metal working machine constructed to carry other tools.

Figure 2 is a top view of the present improvement and which view also shows a rotary work carrying the work.

Figure 3 is a cross sectional View taken on line of Figure 2 looking in the direction of the arrows.

Figure l is a cross sectional view of the rotary spindle illustrating the manner in which one the or character swedging devices may e r oved.

re 5 is a detail, partly sectional View illusc bring one of the stamps and the means for operating it radially, the dotted lines illustrating t on-working position of the latter.

ure 6 is a face view of one of the stamps or c *acter swedging devices.

characters of reference indicate corresponding parts in the several views.

Before explaining in detail the present improvement and mode of operationthereof, I desire to have it understood that the invention is not limited to the detailsof construction and arrangement of parts which are illustrated in the accompanying drawings, since the invention is capable of other embodiments, and that the phraseology Which I employ is for the purpose of description and not or limitation.

This improved attachment in the preferred form thereof is shown applied to a machine having a main tool slide 2 supported on a suitablev 7 base and a rotary work spindle 3 supported on the base and which work spindle may be one of a series thereof and therefore not only rotatable but indexible with its companion work spindles, suitable means being provided for sliding the tool carrier toward and from the work carrier or work spindle and for rotating the latter and also indexing the same when the improvement is applied to such machines as multiple spindle machines, one of which is shown in Patent No. 1,320,609, dated November 4th, 1919, and owned by the National Acme Company, although in practice the improvement may be constructed as an independent machine having a rotary work spindle and a sliding tool carrier having a rotatable tool spindle and provided with means for rotating the spindles and sliding the sliding tool carrier.

In the present instance, it is shown in Figure 1 as applicable to a sliding tool carrier or slide constructed to carry other tools so that other operations may take place on the article to be swedged, as for instance, by preparing it for its swedging operation. In other words, the. article may be first suitably formed by a series of tools carried by the sliding tool carrier preparatory to having the characters swedged thereon, in which case, of course, there may be a plurality of rotary work spindles for indexing the work'from one position to another for the successive tools to operate thereon or the tool slide would have an indexible movement, when used with a single work spindle to carry the successive tools into working position.

Multiple spindle machines such as those referred to, and one of which is shown in the patent to Gridley, No. 904,866 of November 24th, 1908, (see Fig. 6) comprises an indexible work spindle carrier or cylinder commonly indexed by a Geneva mechanism, and this work carrier supports a plurality of rotatable work spindles carrying the stock rods to be operated upon and rotated continuously at a certain speed by means of gears operated from a central gear carried by a driving shaft located axially of the work spindle cylinder and extending through the tool slide hereinafter referred to. One of these work spindles is illustrated at 3. After each stock rod is operated upon at one station, the work carrier is indexed or rotated to carry that rod to another station where that same rod is operated upon by another tool, the indexing of the work carrier being effected by a cam shaft located below the cylinder and operating the Geneva movement. The tools that operate on the ends of the stock rods, as by drilling, reaming or threading, are carried on a tool slide such as 2, having slotted slides for the reception of the tool holders bolted to the tool slide and these tool holders carry the various tools to be used, such as drills, rearners, etc.

This tool slide is supported by a tube through which the driving shaft hereinbefore referred to passes and the tool slide is reciprocated back and forth by suitable cams on a cam drum carried by cam shaft. 7

All this mechanism, however, forms no part of the present improvement which has primarily to do with a swedging attachment adapted to be mounted on one side of the main tool slide 2 in place of some other tool holder and, therefore, a reference to said Gridley Patent No. 904,856 is deemed suihcient to explain how the present improved attachrnent is mounted on the tool slide. In that patent, the main tool slide is shown at Fig. 6, and the indexible work spindle carrier is 46 and the rotatable work spindles are 60 rotated by gears 61 from a central driving shaft 63. The cani shaft '70 and cam drum thereon and its cams 1G9 and 111 reciprocate the main tool slide and on this main tool slide is shown a tool holder 53 and the present swedging attachment may be mounted on the tool slide in the same way as that tool holder and would, therefore, take the place thereof.

As stated, the work spindles are rotated by suitable gearing and, of course, at the same speed, and in the present instance, the stamp holder or spindle 5 is rotated at the same speed as the spindles. For that purpose, it would be geared to the same driving shaft that drives the work spindle 3 since that shaft extends from one end of the machine to the other, being rotated by a motor or belt or by any other suitable source of power.

Supported on the main tool slide 2 by being clamped thereto is a bracket or holder 4 for supporting a tool spindle carrying the character swedglng devices or stamps and therefore this holder 4 is movable with the main slide. Carried by this bracket 4 is a rotating spindle 5 to which rotation may be imparted in any suitable way from any suitable source of power, as from the same shaft that rotates the work spindles 3. lhis spindle is centrally bored to form a head 6 having an interior diameter suitable to encircle the work to be swedged and this head 6 is provided with a series of radial slots '7 for receiving char-- acter carrying members or stamps 8. These stamps are held in place by a front plate 9 so as to rotate with. the spindle 5. Each of these radial stamps is provided with a rearwardly projecting pin 19 cooperating with a spring 11 located in openings 12 of the head which springs operate to push the stamps away from the article to be swedged. Encircling the head of the spindle and thus located around the pins is a strap or ring 13 held in place by a screw 14. This ring prevents the stainps from being shifted by their springs only sufficiently far to have the pins thereof engage the ring and release the work. This ring has a slot 15 cut therein so located that it does not line up with any of the pins 10 of the stamps and when it is desired to remove or replace the stamps it is only necessary to remove the screw 14 and shift the ring so as to line up the slot of the ring with each pin in turn whereupon the stamps may be removed, as shown in Figure 4.

As before stated the tool spindle 5 rotates in the bracket or holder 4 fastened on the tool slide 2 of the machine while the work 16 is secured to the rotary work spindle 3, see Figure 2. The rotary work spindle and tool spindle are rotated in the same direction at substantially the same revolutions per minute.

Held between two thrust collars 1'7 fixed to the tool spindle 5 is a yoke or ring 18 and extending through the holder or bracket l and ring l8 are guide rods 19 for the purpose of guiding this ring. On the ends of each of these rods is a collar 2G and between this collar and the ring is located a coiled spring 21 which holds the ring pressed against the holder or bracket 4, during a part of the travel of the main slide 2.

When the tool slide 2 with its holder or bracket 4 and tool spindle 5 travels forward the desired distance the ringwlll be stopped by suitable rigid stops rods 22 having nuts 23 on the ends thereof for engaging the ring and thus the ring will prevent thev rotary tool spindle from moving further forward with the bracket or holder 4, the rotary tool spindle being connected with. the ring by the collars 17 for movement therewith and for rotary movement relative thereto.

Carried by the holder or bracket 4 is a plurality of cam rolls 23 mounted on the rods 19 located in projecting portions or sleeves 25 of the holder 4 and these rods cam rolls are advanced with the main tool slide 2 and bracket 4, and as these cam rolls are advanced during the further forward movement of the bracket 4 with the main slide 2 and after the advance of the tool spindle 5 has been stopped by the stop nuts 23 they come into position to engage the ends of the rotating stamps carried by the rotating tool spindle 5 and thus force the stamps radially inward to stamp the work with the characters located in the ends of the stamps.

When the main tool slide 2 carrying the holder or bracket 4 starts its return movement away from the end of the work the springs 21 on the guide rods 13 maintain the rotary tool spindle 5 in juxtaposition to the work until the cam rolls have been shifted with the main slide 2 away from the end of the stamps whereupon the springs 11 radially shift the stamps away from the work.

In the operation of the machine the work be ing rotated by the work spindle and the tool spindle being also rotated, the main tool slide moves forward to carry the stamps into position to engage the work thereupon as the slide 2 continues its forward movement, while advance of the tool spindle has been stopped, the

and until this time the tool spindle 5 is maintained in working position and then the springs 11 radially shift the stamps away from the work. This action is the result of the springs 21 on the guide rods 19 holding the ring or yoke 18 against the holder or bracket 4. When the main tool slide 2 moves further rearward the spindle and its ring or yoke are carried away from the stop nuts and shifted rearwardly.

It will be understood that the stamps may be operated by various means such as cams or wedges but the rolls are preferred since they eliminate wear on the ends of the stamps. The number of stamps used control the number of cam rolls, this depending upon the number of blows struck during a revolution and it will be'observed that the stamp devices correspond to a similar formation on the rollers thereby to facilitate the swedging operation.

The ring or yoke and the tool spindle are suitably drilled for the passage of oil to the stamps to facilitate the swedging operation;

It will be understood, of course, that, by reason of the construction of the cam rolls and the outer ends of the stamps or swedging devices, the

. swedging action takes place step by step. That that the other tools of the machine are operating, with the result that the swedging is gradual and the life of the stamps or dies thereby prolonged and the numbering on the work is more uniform, which is highly desirable especially when the work is intended for use in adding machines;

Furthermore, by varying the relative speed of the work and the swedging tool, as, for instance, instead of rotating both of them at the same speed, by rotating one relative to the other at half the speed of the other, each number or character can be stamped by two successively operating duplicate swedging devices. Thus, if the tool is rotated at half the speed of the work and the work is to have ten characters thereon, the tool have twenty characters, each pair of which are duplicates so that during the operation, one of each pair will tart to form a character on the work and th other of each pair will finsh that same character, thus prolonging the faces of the stamps or swedging devices, since the work of swedging is divided between a pair of these devices instead of all coming on one swedging member. Ths also reduces the speed necessary to run the swedging tool. The same result is also obtainable by running the tool at one-third or one-fourth speed, which permits the swedging devices to be multiplied proportionately.

It will be understood, of course, that the work does not necessarily have to be round. It may be other shapes, hexagonal, square, or otherwise.

It "s to be understood that by describing in detail herein any particular form, structure or arrangement, it is not intended to limit the invention beyond the terms of the several claims or the requirements of the prior art.

Having thus explained the nature of my said invention and described a way of constructing and using the same, although without attempting to set forth all of the forms in which it may be made, or all of the modes of its use, I claim:

1. In a character swedging apparatus, the combination of a work carrier and a character swedging carrier rotatable together in the same direction and at substantially the same speed and also reciprocal one relative to the other, said character swedging carrier having a series of radially shiftable character carrying members, and means for shifting said members radially.

2. In acharacter swedging apparatus, the combination of a work carrier and a character swedging carrier, rotatable together in the same direction and at substantially the same speed and having a relatively reciprocal movement, the sw-edging carrier having a series of radially shiftable character carrying members, and means for radially shifting said members, said means having a movement independent of the movement of the swedg ng carrier into position subsequent to the movement of the swedging carrier to radially shift the radial members.

3. In a character swedging apparatus, the.

combination of a'rotatabl-e work carrier and a tool slide, a bracket carried by the slide and movable therewith, a rotatable tool spindle carried by the bracket and movable therewith, bracket having a movement independently there of, a series of radially shiftable stamps carried by the tool spindle, means for limiting the advance movement of. the tool spindle, and means carried by and movable with the bracket and operative after the advance of the tool spindle is stopped to radially shift the stamps to engage the work. I v

4. In a character swedging apparatus, the combination of a rotatable work carrier and a tool slide, a bracket carried by the slide and movable.

therewith, a rotatable tool sp ndle carried by the bracket and movable therewith, said bracket hav ing a movement independently thereof, a series of radially shiftable stamps carried by the tool spindle, means for limiting the advance move ment of the tool spindle, and means carried by and movable wth the bracket and operative after the advance of the tool spindle is stepped to radially shift the stamps to engage the work, the means for limiting the advance of the tool spindle comprising a member carried by the tool spindle rotatable relatively to said member, stop rotating'the article and a swedging means at substantially the same speed in the same direction and duri'ng such rotation swedgingv characters into the articleradially thereof by exerting a swedging hammer action on the article.

7. In a character swedging apparatus, the combination of a work, carrier and a character wedging carrier, both rotatable, said swedging carrier having a plurality of radially shifting swedging devices, and means for shifting said devices step by step into engagement with the said next

work by exerting a swedging hammer action on the article.

8. In a character swedging apparatus, the combination of a rotatable work carrier, a rotatable character swedging carrier adapted to encircle the work, radially shiftable character carrying stamps carried by the swedging carrier, and means for exerting a swedging hammering action on the stamps.

9. In a character swedging apparatus, the combination of a rotatable work carrier, a rotatable character swedging carrier adapted to encircle the work, radially shiftable character carrying stamps carried by the swedging carrier, and means for exerting a swedging hammering action on the stamps and comprising a plurality of cam rolls.

10. In a character swedging apparatus, the combination of a rotatable work carrier, a rotatable character swedging carrier adapted to encircle the work, radially shiftable character carrying stamps carried by the swedging carrier, and means for progressively engaging the ends of the stamps to exert a swedging hammering action upon the stamps.

11. In a character swedging apparatus, the combination of a rotatable work carrier, a rotatable character swedging carrier adapted to encircle the work and both rotatable in the same direction, radially shiftable character carrying stamps carried by the swedging carrier, and means for exerting a swedging hammering action on the stamps.

12. In a character swedging apparatus, the combination of a rotatable work carrier, a rotatable character swedging carrier adapted to encircle the work, both rotatable in the same direction at substantially the same speed, radially shiftable character carrying stamps carried by the swedging carrier, and means for exerting a swedging hammering action on the stamps.

13. In a character swedging apparatus, the combination of a rotatable work carrier, a rotatable character swedging carrier adapted to encircle the work and both rotatable and one reciprocal relative to the other, radially shiftable character carrying stamps carried by the swedging carrier, and means for exerting a swedging hammering action on the stamps.

14. In a character swedging apparatus, the

combination of a rotatable work carrier, a rotatable character swedging carrier adaptedto encircle the work and both rotatable in the same direction and one reciprocal relative to the other, radially shiftable character carrying stamps carried by the swedging carrier, and means for exerting a swedging hammering action on the stamps.

15. In a character swedging apparatus, the combination of a rotatable work carrier, a rotatable character swedging carrier adapted to encircle the work and both rotatable in the same direction at substantially the same speed and one sliding toward and from the other, radially shiitable character carrying stamps carried by the swedging carrier, and means for exerting a swedging hammering action on the stamps.

16. In a character swedging apparatus, the combination of a rotatable work carrier, a rotatable character swedging carrier adapted to encircle the work and slidabletoward and from the work carrier and both rotatable at substantially the same speed in the same direction, radially shiftable character carrying stamps carried by the swedging carrier, and means for exerting a swedging hammer action upon the stamps.

17. In a machine having a rotatable work carrier and a tool slide, a character swedging attachment comprising a bracket bolted to the tool slide, a stamp carrying spindle carried by the bracket and shiftable therewith and rotatable relative thereto, a series of radially shiftable character carrying stamps carried by the stamp carrying spindle and adapted on the advance of the tool slide to encircle the work, means for limiting the advance movement of the stamp carrying spindle, whereby the bracket will have a further advance movement with its slide and independently of said stamp carrying spindle, and means carried by the bracket and operative during the final advance movement thereof with its slide to progressively engage the stamps and shift them radially to exert a swedging hammer action on the stamps to swedge characters into the work.

18. In a machine having a rotatable work carrier and tool slide, a character swedging attachment comprising a bracket bolted to the tool slide, a stamp carrying spindle carried by the bracket and shiftable therewith and rotatable relative thereto, a series of radially shiftable character carrying stamps carried by the stamp carrying spindle and adapted on the advance of the tool slide to encircle the work, means for limiting the advance movement of the stamp carrying spindle, whereby the bracket will have a further advance movement with its slide and independently of said stamp carrying spindle, and cam rolls carried by'the bracket and operative during the final advance movement thereof with its slide to progressively engage the stamps and shift them radially to exert a swedging hammer action on the stamps to swedge characters into the work.

19. In a machine having a rotatable work carrier and a tool slide, a character swedging attachment comprising a bracket bolted to the tool slide, a stamp carrying spindle carried by the bracket and shiftable therewith and rotatable relative thereto in the same direction at the same speed as the rotatable work carrier, a series of radially shiftable character carrying stamps carried by the stamp carrying spindle and adapted on the advance of the tool slide to encircle the work,

means for limiting the advance movement of the stamp carrying spindle, whereby the bracket will have a further advance movement with its slide and independently of said stamp carrying spindle, and means carried by the bracket and operative during the final advance movement thereof with its slide to progressively engagethe stamps and shift them radially to exert a swedging hammer action on the stamps to swedge characters into the work.

20. In a machine having a rotatable work carrier and a tool slide, a character swedging attachment comprising a bracket bolted to the tool slide, a stamp carrying spindle carried by the bracket and shiftable therewith and rotatable relative thereto, a series of radially shiftable character carrying stamps carried by the stamp carrying spindle and adapted on the advance of the tool slide to encircle the work, means for limiting the advance movement of the stamp carrying spindle whereby the bracket will have a further advance movement with its slide and independently of said stamp carrying spindle, means carried by the bracket and operative during the final advance movement thereof with its slide to progressively engage the stamps and shift them radially to exert a swedging hammer action on the stamps to swedge characters into the work, and spring means for etaining the stamp carrying spindle in juxtaposition to the work until the bracket and slide have been shifted away from the work'.

21. In a machine having a rotatable work carrier and a tool slide, a character swedging attachment comprising a bracket bolted to the tool slide, a stamp carrying spindle carried by the bracket and shiftable therewith and rotatable relative thereto, a series of radially shiitable character carrying stamps carried by the stamp carrying spindle and adapted on the advance of the tool slide to encircle the work, means for spindle in juxtaposition to the Work until thebracket and its slide have been shifted away from the work, and spring means for then shifting the stamps away from the Work.

ALFRED E. DRISSNER. 

